size of data

Question

why size of data is different for different data type..Again being different then it is depend on compiler..
like 1 byte for char 2 byte for int..why different??
again in 16bit compiler 2 byte for int,in 32 bit,,4 byte..why?

Answer 1

comptuer understands only 0 and 1...so it stores variables as 0's and 1's
example
0: 0
1: 1
2: 10
3: 11
4: 100 etc...
also every char has it's own code written in 0 and 1
so every symbol has different lenght of zero's and one's and it takes different amount of memory

Answer 2

https://www.tutorialspoint.com/cplusplus/cpp_data_types.htm

read this page and it should get more clear